Objective: to compare the sizes of the temporal lobe gyrus, between both hemispheres, involved in epilepsy surgery. Method: we studied 11 cadaveric human brains measuring, in both hemispheres, hight, width and length of the first 3 temporal gyrus and the usual surgical lines used to limit temporal lobectomies. The statistical analysis was made with the Student test (CI 95% - alpha 0.05). Results: we did not observe significative differences between the measures obtained from the temporal gyrus and the surgical lines in both hemispheres. Conclusion: the differences in the measurements of the temporal gyrus and the surgical lines between both hemispheres were not significative.